Camera apparatus and image processing method

ABSTRACT

A camera apparatus ( 1 ) is constructed which is equipped with an optical system, a photographing element ( 21 ) for converting a light signal of an object to be photographed from the optical system to an electric signal, an A/D conversion unit ( 22 ) for converting the electric signal from the photographing element ( 21 ) to digital image data, a data compression means ( 28   a ) for compressing the image data from the A/D conversion unit ( 22 ) with a prescribed form based on a software program, and data conversion means ( 28 ), ( 31 ) and ( 32 ) for converting the compressed data from the data compression means ( 28   a ) to a prescribed form of data that is recordable into a direct read after write type optical disk or a rewritable optical disk ( 9 ) that records the compressed data, whereby the camera apparatus enables a user to watch on a personal computer static images that have been photographed without making data transfer to the personal computer.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a camera apparatus and an imageprocessing method, and more particularly to a camera apparatus and animage processing method that digitizes an image of an object to bephotographed and that records it in the form of a static image.

2. Field of the Invention

In recent years, with the diffusion of personal computers, etc., digitalcamera apparatuses that digitize an image and record the same have beenbecoming increasingly popular as an image recording apparatus. Thisdigital camera apparatus in general is arranged to have an image, whichbecomes a photographed object, digitized therein, and have thisdigitized image recorded beforehand into a prescribed recording mediumsuch as a flash memory or the like in an amount corresponding to aprescribed number of sheets, as static image data. This static image canthereafter be output to the monitor of a personal computer.

In a conventional digital camera apparatus, as the recording medium forrecording image data thereof, there were used a flash memory of a typebuilt in a main body thereof, a card type flash memory that is removablyinsertable, etc.

However, in the conventional digital camera apparatus, the unit cost ofeach of these memories with respect to one of the photographed sheets ishigh and therefore they are not suitable as storage media. Therefore,after photographing, it is necessary that the photographed static imagedata be transferred to a hard disk, a floppy disk, etc. of a personalcomputer for being copied. This transfer of the data necessitated theuse of a large amount of time and labor. Also, in the conventionaldigital camera apparatus, there was the problem that the price of thosememories was high and so the user could not possess so many sheets ofmemories and therefore the number of photographed sheets was limited.Especially, there was the problem that the opportunities ofphotographing in the outdoors, etc. to that a personal computer cannotbe brought were largely limited.

SUMMARY OF THE INVENTION

The present invention has been proposed in view of the above-describedactual circumstances and has an object to provide a camera apparatuswhich makes it possible to watch photographed static images on apersonal computer without transferring the data to the personalcomputer.

A camera apparatus of the present invention is equipped with an opticalsystem, a photographing element for converting a light signal of anobject to be photographed from the optical system to an electric signal,an A/D conversion unit for converting the electric signal from thephotographing element to digital image data, a data compression meansfor compressing the image data from the A/D conversion unit with aprescribed form in accordance with a software program, and a dataconversion means for converting the compressed data from the datacompression means to a prescribed form of data that is recordable into adirect read after write type optical disk, or a rewritable optical disk,that records the compressed data.

According to the above-described construction of the present invention,the light signal of an object to be photographed from the optical systemis converted to a prescribed form of data that is recordable into adirect read after write type optical disk, or a rewritable optical diskby the photographing element, the A/D conversion unit, the datacompression means, and the data conversion means.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the outer appearance that is taken fromthe front surface side of a digital camera apparatus that has beenprovided by the present invention;

FIG. 2 is a perspective view of the outer appearance that is taken fromthe rear surface side of the digital camera apparatus;

FIG. 3 is a block diagram illustrating the circuit construction of thedigital camera apparatus;

FIG. 4 is a block diagram illustrating the interior of an optical diskcontroller in FIG. 3;

FIG. 5 is a block diagram illustrating a camera block and itsneighboring portions;

FIG. 6 is a view illustrating an address space of the microcomputer;

FIG. 7 is a view illustrating an data area of the DRAM;

FIG. 8 is a flow chart used to explain the control operation at the timeof data recording in the digital camera apparatus;

FIG. 9 is a view illustrating the filename of a main-body image file;

FIG. 10 is a view illustrating information of filenames, recordingtimes, files sizes, etc. of the main-body image file and the thumbnailimage file;

FIG. 11 is a view used to explain the status of the main-body image fileand the thumbnail image file that have been recorded on the opticaldisk;

FIG. 12 is a flow chart used to explain the reading-out control ofreading out the thumbnail image file when performing reproduction by thedigital camera apparatus;

FIG. 13 is a view illustrating a thumbnail management table;

FIG. 14 is a view illustrating a status wherein the thumbnail imagefiles have been stored from the optical disk into prescribed areas ofthe DRAM;

FIG. 15 is a view illustrating a status wherein the thumbnail files,etc. have been displayed on the LCD panel;

FIG. 16 is an exploded perspective view used to explain the mechanicalconstruction of the digital camera apparatus;

FIG. 17 are views illustrating the mechanisms regarding the optical headthat is disposed within the housing of the optical disk drive; and

FIG. 18 is a block circuit diagram illustrating another embodiment ofthe digital camera apparatus.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention is a camera apparatus that is equipped with anoptical system, a photographing element for converting a light signal ofan object to be photographed from the optical system to an electricsignal, an A/D conversion unit for converting the electric signal fromthe photographing element to digital image data, a data compressionmeans for compressing the image data from the A/D conversion unit with aprescribed form in accordance with a software program, and a dataconversion means for converting the compressed data from the datacompression means to a prescribed form of data that is recordable into adirect read after write type optical disk, or a rewritable optical disk,that records the compressed data.

Also, the present invention is constructed in such a way that, in theabove-described camera apparatus, the diameter of the direct read afterwrite optical disk or the rewritable optical disk is 80 mm.

As an embodiment of the present invention, an outer appearance viewtaken from the front side of a digital camera apparatus is illustratedin FIG. 1.

This digital camera apparatus 1 has an outer configuration that isshaped like a substantially rectangular parallelepiped as a whole and isof a portable size. This digital camera apparatus 1 is equipped with ashutter button 3, an objective lens 4, and a flash 5 at the upper parton the front side of a housing 2, and is arranged so as to push theshutter button 3 with an index finger of a user's right hand.

Also, the digital camera apparatus 1 has mounted thereon anopening/closing lid 7 at one side surface portion 6 of the housing 2,and is arranged so that an optical disk 9 hereinafter referred to as “anoptical disk 9”) having a size whose diameter is 80 mm may be loadedinto the interior of the housing 2 from this side surface portion 6side.

It is to be noted that the digital camera apparatus 1 may be constructedso as to receive the optical disk 9 within a disk cartridge 8 such asthat illustrated in FIGS. 1 and 2 in array with the optical disk 9 andto load this disk cartridge 8 having the optical disk 9 received thereininto the interior of the housing 2.

Specifically, as have shown in FIG. 2 the outer appearance as viewedfrom the rear side of the digital camera apparatus 1, an optical diskdrive (ODD) 32 whose details will be later described is disposed in theinterior of the housing 2. The optical disk 9 (or the disk cartridge 8)is inserted from an disk insertion opening (or a cartridge insertionopening) 32 a of the optical disk drive 32.

Further, the digital camera apparatus 1 is equipped with a LCD (LiquidCrystal Display) panel 11 on the rear surface side of the housing 2, andis so arranged that at the time of photographing an object to bephotographed may be displayed on this LCD panel 11.

And, in the digital camera apparatus 1, when an object to bephotographed is photographed by pushing the shutter button 3, image dataof this object to be photographed (hereinafter referred to as “main-bodyimage data”) and thumbnail image data, becoming an index regarding thismain-body image data, are recorded into the optical disk 9 that has beenloaded into the optical disk drive 32, respectively, in the form offiles respectively having extended characters “. JPG” and “. 411”.

Also, the digital camera apparatus 1 is so arranged that, whenreproducing the main-body image data after photographing of the objectto be photographed, thumbnail images regarding the image data that hasbeen recorded in the optical disk 9 may be displayed on the LCD panel 11by the extent corresponding to a prescribed number of sheets, forexample, six sheets. And, by designating a particular thumbnail imagefrom among them, the main-body image data that corresponds to thisthumbnail image is read out from the optical disk 9 and displayed on theLCD panel 11.

Further, the digital camera apparatus 1 is so arranged as to enable theperformance with respect to the rewritable optical disk 9 of variousedits such as, for example, erasing of unnecessary data of the main-bodyimage data and thumbnail image data that have been stored in therewritable optical disk 9, changing of the way of arraying the thumbnailimages displayed on the LCD panel 11, etc.

Namely, in the digital camera apparatus 1, around the LCD panel 11 aredisposed various operation buttons and switches 12 a, 12 b, 12 c, 12 d,12 e, 12 f, 12 g, etc. By operating these various operation buttons,etc, the camera apparatus is so arranged as to enable editing such asthe operation of zooming, etc. when photographing is done, thedesignating of a particular thumbnail image when reproduction is made,erasure of the data and so on.

It is to be noted that, with regard to the opening and closing of theopening/closing lid 7, by moving an opening/closing operation part 13 upand down, the state of engagement between engaging pawls 14 a, 14 binterlocked with this opening/closing operation part 13 and engagingportions 7 a, 7 b of the opening/closing lid 7 is released or held as itis. The opening/closing lid 7 is thereby opened or closed.

Next, the circuit construction of the digital camera apparatus 1 will beexplained.

The digital camera apparatus 1, as illustrated in FIG. 3, is constructedof a CCD 21 that is a photographing element, a sample/hold andanalog/digital conversion circuit 22 (hereinafter referred to, merely,as “a sample/hold circuit 22”), a camera signal processing circuit 23, aDRAM 24, a DRAM controller 25, a panel signal processing circuit 26 forsupplying RGB signals to the above-described LCD panel 11, an operationinput part 27, a microcomputer 28 (hereinafter referred to as “amicrocomputer 28”), an optical disk controller (ODC) 31, and an opticaldisk drive 32 that was described above in connection with FIG. 2.

It is to be noted that the DRAM 24, the DRAM controller 25, themicrocomputer 28, and the ODC 31 are connected to one another by meansof common buses.

In the digital camera apparatus 1, the light rays from an object to bephotographed pass through the objective lens 4 and are received by theCCD 21, and then are converted to electric signals by this CCD 21. Theoutput signal from the CCD 21 is sample/hold processed in thesample/hold circuit 22, and then is A/D converted to a digital signalthat is composed of 10 bits. This A/D converted 10-bit digital signal issupplied to the camera signal processing circuit 23.

The camera signal processing circuit 23 performs proscribed pieces ofprocessing with respect to the 10-bit digital signal supplied from thesample/hold circuit 22, and outputs the processed signals to the DRAMcontroller 25. The camera signal processing circuit 23 generates, inthis embodiment, a luminance signal Y composed of 8 bits and acolor-difference signal C composed of 4 bits, and is so arranged as tooutput these respective signals Y and C to the DRAM controller 25.

The DRAM controller 25 supplies the luminance signal Y and thecolor-difference signal C from the camera signal processing circuit 23to the panel signal processing circuit 26 as they are.

It is to be noted that, in a case where the CCD 21 is not a square grid,the DRAM controller 25 converts the luminance signal Y and thecolor-difference signal C from the camera signal processing circuit 23to square-grid signals, which in turn are supplied to the panel signalprocessing circuit 26. The panel signal processing circuit 26 produces ared signal R, a green signal G, and a blue signal B from the luminancesignal Y and the color-difference signal C that have been input thereto,and outputs these respective RGB signals to the LCD panel 11. As aresult of this, the image of the object to be photographed that becomesa photographed object is displayed on the LCD panel 11.

Also, the DRAM controller 25 stores the luminance signal Y and thecolor-difference signal C from the camera signal processing circuit 23in a prescribed area of the DRAM 24 based on a control signal from themicrocomputer 28 as later described in detail.

The operation input part 27 detects the contents of the operations ofthe shutter button 3 illustrated in FIG. 1 and the various operationbuttons/switches 12 a to 12 g, etc. illustrated in FIG. 2, and outputsthe thus-detected signals to the microcomputer 28 as operation signals.

As the microcomputer 28, there is used, for example, a type of RISC(Reduced Instruction Set Computer: reduced instruction set computer)that can perform high-speed processing. The microcomputer is equippedwith a read only memory (ROM) 28 a that has stored therein a softwareprogram for controlling each of the blocks. The microcomputer 28executes the software program within this ROM 28 a according to theoperation signal from the operation input part 27 to thereby performpieces of processing such as image compression/extension, filemanagement and the like, which are done when performing photographing,reproduction, and editing as have been above referred to.

Practically, the microcomputer 28 stores the luminance signal Y and thecolor-difference signal C from the DRAM controller 25 into theprescribed area of the DRAM 24 when photographing the object to bephotographed, and the microcomputer performs data compression processingon the thus-stored luminance signal Y and the color-difference signal Cwith the use of a JPEG (Joint Photographic coding Experts Group) method.Also, the microcomputer 28 performs write-in processing on the data ofthe main-body image that has been compressed with the JPEG method intoan area, that is different from the above-described area of the DRAM 24,as JPEG stream data. Further, the microcomputer 28 reads out the JPEGstream data from the DRAM 24, and converts this data into an ISO9660(International Organization for Standardization 9660: CD ROM logicalformat) format to thereby perform a piece of processing of supplying theresulting data to the ODC 31. And, the microcomputer 28 controls the ODC31 so as to write the data, which has been converted to the ISO9660format, into the optical disk 9 (within the disk cartridge 8) that hasbeen loaded into the optical disk drive 32.

Here, in FIG. 4, illustration is made of a block diagram within theoptical disk controller (ODC) 31 of FIG. 3.

An optical pick-up 70 is constructed being equipped with a LD(semiconductor laser diode) driver and a PDIC (photodiode IC)constituting a light-receiving element.

As the control blocks there are five blocks, that is, an analogdetecting part B1, a recording servo part B2, an interface part B3, acontroller part B4, and a driver part B5. It is to be noted that adetailed explanation will be omitted of the details of the interiors ofthe respective part.

The analog detection part B1 processes the detection signal that hasbeen obtained in the optical pick-up 70 and transmits it to therecording servo part B2.

The recording servo part B2 supplies a signal for use as an outputsignal to the interface part B3 based on the signal that has beensupplied thereto. Simultaneously, the recording servo part sends acontrol signal for controlling a spindle motor and a sled motor,focusing/tracking, insertion/ejection of the optical disk, etc. to thedriver part B5.

The driver part B5 outputs a signal for driving the spindle motor andthe sled motor, for controlling focusing/tracking, and for driving theinsertion/ejection of the optical disk based on the control signals.

On the other hand, the interface part B3 performs processing of itsoutput signal so as to enable transmission and reception of signalsbetween itself and the outside of the apparatus. In this interface partB3, there is performed the reception of the operation signal that issent from the microcomputer 28 and the data that is sent from the DRAMcontroller 25 shown in FIG. 3.

The controller part B4 performs the control of the recording servo partB2 and the interface part B3.

Also, the digital camera apparatus 1 according to this embodiment isconstructed to have a camera block for inputting image dataadditionally.

FIG. 5 is a block diagram illustrating the camera block and itsperipheral blocks.

The camera block 80 is constructed in a form having a lens unit composedof a plurality of lens including an objective lens, and the CCD 21.

Also, as the blocks for controlling the camera block 80, there are acamera timing generator (TG) 82, a lens actuator 83, a camera controlMPU 84 that sends a control signal to each of these elements to performthe control thereof, and the above-described microcomputer 28. Thecontrol block arrangement is constructed having those elements.

The CCD 21 performs reading-out of images and transferring of image dataaccording to a timing pulse signal for use for transfer and drive thathas been prepared in the camera TG 82 according to a control signal fromthe camera control MPU 84.

Also, regarding the lens unit 81, in the lens actuator 83, focus,aperture, exposure, and so forth are controlled according to a controlsignal from the camera control MPU 84.

Between the camera control MPU 84 and the microcomputer 28 informationof, for example, the operation status or the like is transmitted andreceived. Regarding the blocks of the camera signal processing 23 andthe DRAM controller 25 that were stated above in connection with FIG. 3,also, information transmission and reception are similarly performedbetween these blocks and the microcomputer 28.

It is to be noted that there may be adopted a construction wherein thecamera control MPU 84 and the microcomputer 28 are combined as oneblock.

Further, it is preferable to construct a control block so that, in acase where there is being used a writable optical disk such as a CD-R orthe like, even when write-in error occurs for some reason or other, datamay be written again into an area that is next to the area involving thewrite-in error, and that, in addition, at the point in time when all thedata items have their write-in completed, continuous correct data can beread out as if the area in which error has occurred did not exist.

FIG. 6 is a view illustrating an address space of the microcomputer 28.In the microcomputer 28, as illustrated in FIG. 6, an area of 0000000 to0ffffff corresponds to a built-in ROM area, an area of 2000000 to2ffffff corresponds to the area for the ODC 31, an area of 5000000 to5ffffff corresponds to the area for the peripheral modules that arebuilt in, an area of 9000000 to 9ffffff corresponds to the area for theDRAM 24, an area of e000000 to effffff corresponds to the area for aflash memory as later described, and an area of f000000 to fffffffcorresponds to the built-in RAM area.

FIG. 7 is a view illustrating the data areas of the above-described DRAM24, whose storage capacity is 8 megabytes in total. In the DRAM 24, anarea from 9f00000 to 9f77fff of 491025 bytes is allotted as an originalpicture image data storage area (hereinafter called “an area A”) forstoring therein image data corresponding to one sheet of main-body imagefor being displayed on the LCD panel 11. Also, in the DRAM 24, an areafrom 9f78000 to 9f7ffff of 32768 bytes is allotted as acompression/development working area (hereinafter called “an area B”)for performing compression processing, or development processing, withrespect to the original picture image data, in accordance with the JPEGmethod. It is to be noted that this area B is also used as the area forproducing the thumbnail data from the original picture image data.

And, in the DRAM 24, an area from 9f80000 to 9f87fff of 32768 bytes isallotted as a main routine common area hereinafter called “an area C”)as the working area, which permits the microcomputer 28 to execute amain routine at the time of recording and reproduction, whose detailswill be described later.

Also, in the DRAM 24, an area from 9f90000 to 9fcffff of 262144 bytes isallotted as a thumbnail image storage area (hereinafter called “an areaE”), in which are stored a plurality of thumbnail image data files (thatcorrespond to, for example, 50 image sheets). An area from 9fd0000 to9ffffff of 19608 bytes is allotted as a JPEG file image storage area(hereinafter called “an area F”), in which there are stored files of themain-body image data that has been produced by compression thereofperformed with the use of the JPEG method.

Next, the control operation when data recording is performed in thedigital camera apparatus 1 will be explained with reference to a flowchart of FIG. 8.

In a step S1 after the power source is made on, the microcomputer 28determines whether or not the optical disk 9 (or the disk cartridge 8)is being loaded. If it has been determined that the optical disk isalready loaded, the process proceeds to step S3 while if it has beendetermined that the optical disk is not loaded, the process proceeds tostep S2.

In step S2, the microcomputer 28 causes the characters “NO DISK” to bedisplayed on the LCD panel 11 to thereby give a warning to a user, andsimultaneously waits until the optical disk 9 (or the disk cartridge 8)is loaded.

In step S3, in order to make its determination of whether or not writeinto the optical disk 9 is possible, the microcomputer detects whetheror not write protect is made on the optical disk 9 (or the diskcartridge 8). If write protect is made thereon, the process proceeds tostep S4 while if no write protect is made thereon, the process proceedsto step S5.

In step S4, the microcomputer 28 warns the user that write-in isimpossible, and terminates the processing. Specifically, themicrocomputer causes the characters of, for example, “DISK PROTECT” orthe like to be displayed on the LCD panel 11.

In step S5, the microcomputer 28 controls the ODC 31 to therebyreproduce the PVD (information of 16th) of the optical disk 9 throughthe operation of the optical disk drive 32, and thereby reads in theroot directory area and the pass table information in the correspondingtrack. The microcomputer thereby extracts various items of informationsuch as filenames and their addresses that exist in the data area of theoptical disk 9.

The microcomputer 28 in subsequent step S6 produces a file list table(File List Table), and enumerates the various items of informationextracted in step S5 in this table. Then, the process proceeds to stepS7.

In step S7, the microcomputer 28 checks whether or not the optical disk9 is a disk with the ISO 9660 method. If the result is YES, the processproceeds to step S9, and if the result is NO, the process proceeds tostep S8.

In the step S8 in which the optical disk 9 is not a disk with the ISO9660 method, the microcomputer 28 causes the characters “DISK ERROR” tobe displayed on the LCD panel 11 and terminates the processing.

The microcomputer 28 in step S9 waits until a release is input. Namely,the microcomputer waits until the shutter button 3 illustrated in FIG. 1is pressed, and, when the shutter button has been pressed, the processproceeds to step S10.

In step S10, the microcomputer 28 stores the image data obtained byphotographing an object to be photographed into the area A, illustratedin FIG. 7, of the DRAM 24, and thereby performs take-in processing ofthe main-body image.

In the next step S11, the microcomputer 28 performs the processing ofcompressing the image data stored in the area A of the DRAM 24 in thearea B with the use of the JPEG method, and thereby produces themain-body image data, and then stores the thus-produced main-body imagedata into the area F of the DRAM 24 in the form of a file.

In the subsequent step S12, the microcomputer 28 performs thinning ofthe data of the main-body image previously taken in at the step S10 intoa prescribed amount of data at a unit of a pixel, and thereby producesthumbnail image data that is a sub-sample of the main-body image. Themicrocomputer stores this thumbnail image data into the area B of theDRAM 24 in the form of a file. It is to be noted that, in this digitalcamera apparatus 1, the thinning of the data is performed so that thisthumbnail image file may have a prescribed capacity.

In the next step S13, the microcomputer 28 investigates the remainingrecording capacity of the optical disk 9 before recording of therespective items of data therein, for example, by reference to theabove-described file list table. And the microcomputer 28 compares thisremaining recording capacity and the sum capacity of the main-body imagedata and the thumbnail image data that are stored respectively in thearea F and the area E in the steps S11 and S12. The microcomputerthereby determines whether or not the remaining capacity of the opticaldisk 9 is large enough to record further. If it has been determined thatthe remaining capacity is enough, the process proceeds to step S15 whileif it has been determined that the remaining capacity is not enough, theprocess proceeds to step S14.

In the step S14, the microcomputer 28 causes the characters of, forexample, “DISK FULL” or the like to be displayed on the LCD panel 11 tothereby give the user a warning of this, the process thereafterproceeding to step S23.

In step S15, the microcomputer 28 investigates the number of the filesrecorded already in the optical disk 9 by referring to the file listtable, and thereby determines whether or not the number of files thatare to be further recorded is limited. If the number of further files islimited, namely if filenames can be added any further, the processproceeds to step S14. If this number is not limited, the processproceeds to step S16.

Namely, in the above-mentioned steps S13 and S15, it is determinedwhether or not the main-body image files and the thumbnail image filescan be recorded in the present status of the optical disk 9.

In step S16, the microcomputer 28 prepares filenames with regard to therespective ones of the main-body image file and the thumbnail imagefile. As illustrated in FIG. 9, these filenames become a filename of“MVC - 001S. JPG” with regard to the first one of the main-body imagefiles. On the other hand, the first thumbnail image file correspondingto this main-body image file becomes a filename of “MVC - 001S. 411” asshown FIG. 10. Namely, the “JPG” and “411” are respectively the extendedcharacters of the main-body image file and the thumbnail image file. Themain-body image file and the thumbnail image file differ from each otherin respect of only these extended characters alone and become identicalin the other portions.

Here, the portion “MVC -” becomes a so-called “name fixed portion” thatis used commonly to each of the main-body image file and itscorresponding thumbnail image file. Also, the portion “001” is a serialnumber, for which are used different numerals every main-body image fileand its thumbnail image file by referring to the file list table.

This serial number covers from 001 to 999. And a numeric value that isobtained by adding 1 to a maximum number on the disk is made to be a newnumeric value. It is to be noted that in a case where by referring tothe file list table there has been a main-body image file or a thumbnailimage file having a serial number of 999, there is allotted a numberthat has been chosen from the numeric values, that are among thosestarting from 001 and that have not been used yet.

Further, the portion “S” is the portion indicating the degree thatcorresponds to the ratio of compression in which the data of themain-body image file is compressed. In this case, it is shown that themain-body image file is the file that is composed of the data that hasbeen obtained by performing standard compression with respect to thismain-body image file. It is to be noted that in a case where themain-body image file is the file that is composed of the data that hasbeen obtained by performing compression for use on high quality ofimages with respect thereto, this portion becomes “F”.

In the next step S17, the microcomputer 28 produces a main-body imagefile allocation for recording the main-body image file into a prescribedarea of the optical disk 9. In the concrete, the microcomputer ensuresthe area from the inner-peripheral side of the optical disk 9 andthereby determines the area for recording the main-body image filetherein and then stores the same.

In the subsequent step S18, the microcomputer 28, by controlling the ODC31, performs the processing of writing the main-body image file into thearea on the optical disk 9 that has been determined in step S17, withthe use of the optical disk drive 32.

Further, in step S19, the microcomputer 28 produces a thumbnail imagefile allocation for recording the thumbnail image file into a prescribedarea of the optical disk 9.

Then, in the next step S20, the microcomputer 28 adds the informationitems regarding those two files to the file list table, and therebychanges this file list table. Then, the process proceeds to step S21.

In step S21, the microcomputer 28 transfers the thumbnail image filefrom the area B to the area E of the DRAM 24. After finishing theprocessing in the step S21, the microcomputer 28 confirms the input ofthe disk EJECT in step S22. If it is input, the microcomputer 28controls the ODC 31 in step S23 to write the thumbnail image file in anarea of the optical disk 9 determined in step S19 by the optical diskdrive 32. Then, the microcomputer 28 writes the directory fileinformation updated in step S24 in a predetermined area of optical disk9 by the optical disk drive 32. Then, the microcomputer 28 writespredetermined information in a read-in-read-out area of optical disk 9in step S25 and performs closure processing of closing the session, andthen terminates the process. If the EJECT is not input, the processreturns to the state of waiting the input of the release in step S9.

Through the execution of the above-described steps of processing, in thedata area of the optical disk 9 are recorded the main-body image filesand the thumbnail image files as illustrated in FIG. 11. It is to benoted that, here, for the sake of explanation, the filenames of themain-body image files and the thumbnail image files are abbreviated asA. JPG, B. JPG, . . . and A. 411, B. 411, . . . FIG. 11 illustrates astatus wherein in a case where having recorded four main-body imagefiles A. JPG, B. JPG, C. JPG, and D. JPG in the order mentioned, thethumbnail image files A. 411, B. 411, C. 411, and D. 411 correspondingthereto are recorded.

Namely, in this digital camera apparatus 1, although the main-body imagefiles are recorded and arrayed sequentially from the head of the dataarea of the disk, the thumbnail image files are so arranged as to becollectively written in after the disposition of the main-body imagefiles at the time of EJECT of the disk.

In this way, in a case where recording the respective masses of datawith respect to the so-called empty optical disk 9, the main-body imagefiles and the thumbnail image files are recorded in the area portions ofthe optical disk 9 that are physically separated from each other. And,in addition, the thumbnail image data items are recorded successivelyfrom one end side of the data area of the optical disk 9. Therefore,reading-out of a plurality of the thumbnail image data items becomesable to be performed quickly as if they were a single file of dataitems. As a result, the time period required to perform this reading-outthereof is greatly shortened.

Also, since only the thumbnail image data items alone are recorded in astate of one lump, useless data processing becomes unnecessary. Further,since there is no need to cause the main-body image file to hold thethumbnail information therewith, it is not necessary that the thumbnailinformation depends on the file format of the main-body image file.

Next, the read-out control for reading out the thumbnail image fileswhen reproduction is made in the digital camera apparatus 1 will beexplained with reference to a flow chart of FIG. 12.

After entry into a thumbnail data read-out mode, the digital cameraapparatus 1 executes a series of pieces of processing from step S31 tostep 40 that are explained below.

In step S31, the microcomputer 28 controls the ODC 31 to therebyreproduce the PVD (16th-sector information) of the optical disk 9through the operation of the optical disk drive 32, and thereby startsto read out the information on the thumbnail file, then proceeding tostep S32.

In step S32, the microcomputer 28 performs processing of extracting thefilenames of effective thumbnail image files. Specifically, themicrocomputer examines the correspondence relationship of the thumbnailimage files to the main-body image files by referring to the rootdirectory information and file management information from the PVD, andthereby discriminates whether or not the thumbnail image files areeffective according to whether corresponding main-body image files existor not. Then, the microcomputer extracts only the filenames of theeffective thumbnail image files. Also, when having examined thecorrespondence relationship between the thumbnail image files and themain-body image files, if the thumbnail image files corresponding toprescribed main-body image files do not exist, the microcomputer hasstored therein information such as the filenames of this prescribedmain-body image files, etc.

In the next step S33, the microcomputer 28 arranges the thus-extractedfilenames of the effective thumbnail image files in the physical addressorder in the optical disk 9.

In the next step S34, the microcomputer 28 produces a thumbnailmanagement table shown in FIG. 13, that is used for the purpose ofrelating the main-body image files to the addresses of the respectivethumbnail image files. It is to be noted that, in a case where there areno thumbnail image files corresponding to prescribed main-body imagefiles that were stated when reference was made to the step S32, it isarranged that when producing this thumbnail management, table blankimage data, whose details will be described later, is allotted to theprescribed main-body image file.

The thumbnail management table includes a column of file numbers, acolumn of main-body image files and a column of addresses ofcorresponding thumbnails. In this embodiment, the columns of the filenumbers and the main-body image files are arranged in the order ofrecording of the main-body image files. In the column of addresses ofcorresponding thumbnails, head addresses in an area upon being stored inthe area E of DRAM 24 according to the rearranging order carried out instep S33 are respectively described. As to the main-body image file 005.JPG with no corresponding thumbnail image file, for example, 0 isdescribed as the head address of an area on the DRAM 24 in which a blankimage data is stored.

In the subsequent step S35, the microcomputer 28 controls the ODC 31 andthereby reads out one of the thumbnail image files from the optical disk9 through the operation of the optical disk drive 32. Then, themicrocomputer 28 stores this one thumbnail image file into the area E ofthe DRAM 24 illustrated in FIG. 7, then proceeding to step S36.

In step S35, the thumbnail image file 009. 411 positioned on the outerperiphery side of magnetic disk 9 a is read out and stored in areas ofaddress numbers of a to b−1 in the area E of DRAM 24, for example, asshown in FIG. 14.

In step S36, the microcomputer 28 determines whether the processing ofstep S35 has been normally ended, namely whether one thumbnail imagefile has been normally read out. If it has been determined that thisprocessing has been normally ended, the process proceeds to step S38while if it has been determined that it has not been normally ended, theprocess proceeds to step S37.

In step S37 that succeeds when it has been determined in step S36 thatthe processing has not been normally ended, the microcomputer 28performs its processing as that no thumbnail image files exist, thenproceeding to step S38. Specifically, the microcomputer changes theabove-mentioned thumbnail management table and sets a pointer forcausing it to correspond to the above-mentioned blank image.

In step S38, the microcomputer 28 determines whether or not having readout the thumbnail image files until the end. If a “YES” determination ismade, the process proceeds to step S40 and terminates the processing. Ifa “NO” determination is made, the process proceeds to step S39.

In step S39, the microcomputer 28 makes a preparation for read-out ofthe next thumbnail image file and returns to the above-described stepS35. As a result of this, the microcomputer 28 repeatedly performs thepieces of processing from step S35 to step S39 until all the effectivethumbnail image files are read out.

Then, as shown in FIG. 14, the thumbnail image file is stored in thearea E of DRAM 24 in the order of 008.411, 007.411, 006.411, 004.411,010.411, 002.411 and 001.411.

Incidentally, as described above, because the thumbnail image file005.411 is not described in the magnetic disk 9 a, 006.411 is read inthe DRAM 24 after 004.411. Further, the main-body image file with nothumbnail image file exists in the magnetic disk 9 a, so that the blankimage data for displaying the case instead of the case where nothumbnail file exists is stored in the predetermined area (areas of 0 toa−1 in FIG. 14) of DRAM 24.

After all the thumbnail image files in the magnetic disk 9 a are storedin the DRAM 24, the microcomputer 28 controls the DRAM controller 25,the panel signal processing circuits 26 and so on such that 6 pieces ofthumbnails are displayed on the LCD 11. At this time, the thumbnails aredisplayed on the LCD 11 in the order of file number by referring to thethumbnail management table.

Thus, as shown in FIG. 15, 6 pieces of thumbnails are displayed on theLCD 11. By the way, because there is no thumbnail image filecorresponding to 005. JPG, the main-body image file name or the like maybe displayed within a gray image having a size same as that of, forexample, another photographed image as the blank image described above.

In the digital camera apparatus 1, the main-body image filecorresponding to one thumbnail among 6 pieces of thumbnails displayed isread out from the magnetic disk 9 a based on the operation signal fromthe operation input unit 27. The main-body image file is stored in thearea F of DRAM 24 and displayed on the LCD 11 in an enlarged scale afterthe development processing is performed by the microcomputer 28 based onthe JPEG method.

Next, the mechanical construction in the interior of the digital cameraapparatus 1 will be explained. As illustrated in FIG. 16, this digitalcamera apparatus 1 is so arranged that the housing thereof may bedividable into a front surface side half 2 a and a rear surface sidehalf 2 b. On the interior side located inward from these halves 2 a, 2 bare disposed a rotary circuit 41, a chassis 42, and the optical diskdrive 32 that was explained in connection with FIG. 3. In practice, thecircuit board 41, the chassis 42, and the optical disk drive 32 are eachmade into a substantially equal and substantially rectangular planarconfiguration, and these members are disposed within the housing 2 insuch a way that these rectangular configurations overlap each other.

Further, concretely, as illustrated in FIG. 16, the circuit board 41 isfixed at its four corner portions to one main surface of the chassis 42that faces the front surface side half 2 a, by a plurality of screws 43.Also, the optical disk drive 32 is attached to, and in opposition to,the other main surface of the chassis 42 facing the rear surface sidehalf 2 b via buffer members 45, 46, 47, and 48, whose details will bedescribed later. And it is arranged that the chassis 42 having attachedthereto the circuit board 41 and the optical disk drive 32 is fixed tothe front surface side half 2 a of the housing 2, from the upper sidethereof, and is fixed thereto also from the side surface side althoughillustration thereof is not made, by means of screws 44.

Here, the circuit board 41 is made into a substantially rectangularplate configuration, and, on both main surfaces thereof are mountedvarious chips such as a LSI, etc. becoming the circuit blocksillustrated in FIG. 3.

The chassis 42 is formed of metal such as stainless steel or the like,and a main surface portion 42 a thereof is locally cut out largely. Inthe chassis 42, from an upper edge side of the main surface portion 42a, a lower edge side thereof, and a right edge side in FIG. 16 areformed, respectively, an upper flange 42 b, a lower flange 42 c, and aside flange 42 d in the direction of these flanges facing the rearsurface side half 2 b.

The optical disk drive 32 is attached to the chassis 42 by screwing viathe four buffer members 45, 46, 47, and 48. Namely, in the upper flange42 b and the lower flange 42 c of the chassis 42 and the respectivebuffer members 45 to 48 are formed hole portions for permitting thepassage of screws 49, 50, 51, and 52 therethrough. These screws 49 to 52are screwed into the threaded holes that have been formed at theircorresponding positions of the optical disk drive 32. Then, the opticaldisk drive 32 is thereby fixed to the chassis 42.

Here, it is arranged that a housing 32 b of the optical disk drive 32and the main surface portion 42 a of the chassis 42 are kept out ofdirect contact with each other, and that the vibrations and impacts thathave been applied to the chassis 42 are transmitted to the optical diskdrive 32 via each of the buffer members 45 to 48. On the other hand, inthe relationship between the chassis 42 and the circuit board 41, asdescribed above, since the four corner portions of the circuit board 41are fixed to the main surface portion 42 a of the chassis 42 by thescrews 43, the vibrations and impacts that have been applied to thechassis 42 are transmitted to the circuit board 41 as they are.

The respective buffer members 45 to 48 are the ones which are intendedto delay the time period that is taken until the impacts that have beenapplied from the outside to the housing 2 are transmitted to the opticaldisk drive 32. Therefore, each of them is formed of an appreciably softquality of material such as rubber, sponge, silicone, soft plastic andso on. It is to be noted that the respective buffer members 45 to 48also have the function of transmitting the impacts applied to thehousing 2 to the optical disk drive 32 by somewhat weakening the same.

It is to be noted that it is also possible to provide an elastic membersuch as a spring or the like in place of the buffer members 45 to 48made of the above-described soft quality of material and thereby causethis elastic member to have the function of absorbing the impacts.

Further, it is also possible to provide a damper or the like andthereby, as in the case of the above-described buffer members 45 to 48,make this damper have the vibration-absorbing function of absorbing thevibrations that have occurred in the elastic member due to the impacts.

Further, it is also possible to make a concurrent use of the impactabsorbing function and the vibration absorbing function. Furthermore, byusing semi-fluidizable material such as a gel or the like, it is alsopossible to make the same material exhibit the two functions.

Additionally, although, in the above-described embodiment, it isarranged that the optical disk drive 32 and the housing 2 are connectedto each other via the chassis 42, it may be arranged that the opticaldisk drive 32 and the housing 2 are connected to each other without theintervention of the chassis 42 between these two members. In this case,it is sufficient that the hole portions for the passage of the screws 49to 52 therethrough be formed on the housing 2 side; and the screws 49 to52 be inserted into these hole portions, thereby mounting the opticaldisk drive 32 to the housing 2 via each of the buffer members 45 to 48.

FIG. 17 is a view illustrating the optical head disposed within thehousing 32 b of the optical disk drive 32 and its neighboringmechanisms. As illustrated in FIG. 17A, the optical pick-up 70 isdisposed within the housing 32 b of the optical disk drive 32.

This optical pick-up 70 is constructed of two members 71 and 72. And alens 74 is seen in the upper surface of the upper member 71.

This lens 74 is located in such a way as to oppose the main surface ofthe optical disk 9.

Within the interiors of the upper and lower members 71 and 72 of theoptical pick-up 70 there exist, although not illustrated, asemiconductor laser for emitting laser light that is to be radiated ontothe optical disk, an optical path of laser light and various opticalparts, a biaxial actuator for controlling the movement for causingfocusing and tracking of the lens 74 for converging and radiating thelaser light onto the optical disk, a light receiving element forreceiving and detecting a laser light reflected from the optical disk 9,etc.

Also, as illustrated in FIG. 17B, there exist also a feed motor (sledmotor) 78 for making a drive for moving the optical pick-up 70 in theradial direction of the optical disk 9, and rails 75 and 76 that serveas guides for this movement.

Specifically, the lower member 72 of the optical pick-up 70 slides alongthe rails 75 and 76 and thereby the optical pick-up is moved in theradial direction of the disk. On the feed motor 78 side of the member 72are formed teeth 73. To the teeth is transmitted the drive of the feedmotor 78 via a gear 79.

Also, on the central lower side of the main surface of the optical disk9 is disposed a spindle motor 77 for making rotation drive of theoptical disk 9.

The optical pick-up that serves as the optical head operates withrespect to the optical disk 9 rotated by the spindle motor in adirection parallel with the main surface thereof. This operation is madeat a distance interval that enables the laser light to be radiated ontoa prescribed area of the recording surface of the optical disk 9 byconvergence of laser light by the objective lens.

And it is arranged that the main-body image data or the thumbnail imagedata is recorded or reproduced by heating due to the radiation of laserlight onto the recording track of the optical disk 9, or by detectingthe signal of the laser light reflected by the recording track of theoptical disk 9.

And the optical pick-up moves along the rails (the guide shafts) 79 inthe radial direction of the optical disk 9 (the arrow-indicateddirection in FIGS. 17A and 17B). To be concrete, when the sled motorrotates through a prescribed angle of rotation, the optical pick-upmoves over each of the recording tracks formed on the optical disk 9 inthe radial direction of the optical disk 9.

Here, when a high strength of impact is applied to the optical diskdrive 32 as a whole, the housing 32 b thereof and the head arm 73 areflexed, with the result that the positional displacement of the opticalhead with respect to the recording track of the optical disk 9 iscaused, which becomes a cause of defective write-in when recording ofdata is performed.

As illustrated in FIG. 18, this digital camera apparatus 1 may be madeto have a construction having a flash memory 29. In the embodiment ofFIG. 18, the DRAM 24, the DRAM controller 25, the microcomputer 28, theflash memory 29, and the ODC 31 are connected to one another by commonbuses. By making this construction, in the digital camera apparatus 1,for example, in order to cause version-up of the function of the digitalcamera apparatus 1, it becomes possible to store the programs for use onthe version-up into this flash memory 29. In practice, the optical disk9 having recorded therein a program for compressing the image data withthe use of a method other than the above-described JPEG method is loadedonto the optical disk drive 32, and, from the optical disk, this programis read into the flash memory 29, thereby enabling the extension of thefunction.

Namely, in the digital camera apparatus 1, the controls of therespective blocks are performed by using the software programs storedwithin the ROM 28 a of the microcomputer 28. Therefore, the softwareprograms for use on various pieces of version-up are stored in the flashmemory 29, and it may be arranged to make these software programs workinstead of the microcomputer 28 or assist the microcomputer 28.

According to the digital camera apparatus 1 of the above-describedembodiment, the light signal of an object to be photographed from theoptical system is recorded into the optical disk 9 after having beenconverted to a prescribed format of data by the CCD photographingelement 21, the A/D conversion unit, the data compression means, and thedata conversion. Therefore, by loading this optical disk 9 having hadthe static images of the photographed object recorded therein onto theoptical disk drive of a personal computer, it is possible to easilywatch the photographed static image on the personal computer.Accordingly, it becomes unnecessary to transfer thephotographed-static-image data to the hard disk or floppy disk in thepersonal computer and copy the same after photographing. As a result ofthis, the user is released from a large amount of time and the laborthat are otherwise needed for transfer of the data.

And, especially, by using the direct read after write type optical diskor the rewritable optical disk 9 as the recording medium as describedabove, a large number of images can be recorded on one sheet of opticaldisk 9.

Further, in a case where having used the optical disk 9 whose diameteris 80 mm, there is the merit of enabling miniaturization of the digitalcamera apparatus 1 and, in addition, there is also the merit that theuser can easily watch the images as described above. This is because inthe optical disk drive loaded in a personal computer, ordinarily, notonly the optical disk having a diameter of 120 mm but also the opticaldisk having a diameter of 80 mm can be reproduced.

The camera apparatus of the present invention is not limited to theabove-described embodiment and permits various other constructions to bemade without departing from the subject matter of the present invention.

According to the above-described digital camera apparatus 1 of thepresent invention, the light signal of an object to be photographed fromthe optical system is recorded onto the optical disk 9 after having beenconverted to a prescribed format of data by the photographing element,the A/D conversion unit, the data compression means, and the dataconversion. Therefore, by loading this optical disk having had thestatic images of the photographed object recorded thereon onto theoptical disk drive of a personal computer, it is possible to easilywatch the photographed static images on the personal computer.Accordingly, it becomes unnecessary to transfer thephotographed-static-image data to the hard disk, the floppy disk or thelike in the personal computer and copy the same after photographing. Asa result of this, the user is released from the large amount of time andthe labor that are otherwise needed for transfer of the data.

Also, since the price of the medium is relatively inexpensive and theuser can therefore possess many sheets of medium, the user is releasedfrom the limitation that is imposed on the number of photograph sheets.

Having described preferred embodiments of the present invention withreference to the accompanying drawings, it is to be understood that thepresent invention is not limited to the above-mentioned embodiments andthat various changes and modifications can be effected therein by oneskilled in the art without departing from the spirit or scope of thepresent invention as defined in the appended claims.

1. A camera apparatus, comprising: an optical system; a photographingelement for converting a light signal of an object to be photographedfrom the optical system to an electric signal; an A/D conversion unitfor converting the electric signal from the photographing element todigital image data; a control means for compressing the image data fromthe A/D conversion and also converting the compressed data to image dataof a prescribed form; and an optical disc for storing the image data ofthe prescribed form, wherein said optical disc is a direct read afterwrite type optical disk or a rewritable type optical disk, wherein saidoptical disc stores the image data of the prescribed form whichcorresponds to each photographed object, and wherein thumbnail imagedata corresponding to the image data compressed and converted by thecontrol means is produced and temporarily stored in a memory; saidthumbnail image data being transferred from said memory and recordedonto said optical disc only when an eject command in input.
 2. A cameraapparatus according to claim 1, wherein the direct read after writeoptical disk or the rewritable optical disk is an optical disk with adiameter of 80 mm.
 3. A camera apparatus according to claim 1, wherein acommon file name is given to thumbnail image data corresponding to thecompressed and converted image data.
 4. A camera apparatus according toclaim 1, wherein serial numbers with a time are given to the compressedand converted image data and the thumbnail image data.
 5. A cameraapparatus according to claim 1, wherein a plurality of the thumbnailimage data are sequentially recorded in the optical disk.
 6. An imageprocessing method, comprising: a step of converting a light signal of anobject to be photographed from an optical system to an electricalsignal; a step of A/D converting the electric signal to digital imagedata; a step of compressing the image data; a step of converting thecompressed image data to a prescribed form of image data; a step ofproducing thumbnail image data corresponding to the compressed andconverted image data and temporarily storing the thumbnail image data ina memory; and a step of storing in an optical disc the image data of theprescribed form, in which said optical disc is a direct read after writetype optical disk or a rewritable type optical disk, said thumbnailimage data being transferred from said memory and recorded onto saidoptical disc only when an eject command in input; wherein image data ofthe prescribed form corresponding to each photographed object is storedin said optical disc.
 7. An image processing method according to claim6, wherein the direct read after write optical disk or the rewritableoptical disk is an optical disk with a diameter of 80 mm.
 8. An imageprocessing method according to claim 6, wherein a common file name isgiven to thumbnail data corresponding to the compressed and convertedimage data.
 9. An image processed method according to claim 8, whereinserial numbers with a time are given to the compressed and convertedimage data and thumbnail image data.
 10. An image processing methodaccording to claim 8, further comprising a step of recording a pluralityof the thumbnail image data on the optical disk sequentially.